知识贝壳
知识贝壳
所属栏目：英汉烟草科技
A summary of the major chemical characteristics of the principal tobacco types is given in Table 4. 1. The descriptive words used are intended to give a relative ranking with regard to a property and are notmeant to represent an absolute level. For instan ......（本文共 6668 字 ） [阅读本文] >>